Problem with logging into account Microsoft

Question

Hello! I have weird problem with some accounts. For all accounts I have another verify account (outlook recovered by outlook), some have also phone number as recovery. I figured out I cannot re-add to other accounts the phone number (not new account). The issue is that out of 4 accounts, 2 REQUIRE code from email (outlook) to log (along with password) and I cannot mark "remember this pc". I'm wondering if it's something that gonna be for all accounts so I should double secure the "recovery" with other ways, or it's just a bug? (Outlook/Onedrive etc through Web)